Improved variable speed control of series‐connected DC wind turbines for offshore wind power collection to high‐voltage direct current system

Shi, Gang; Zhang, Jianwen; Cai, Xu; Zhu, Miao; Yao, Liangzhong

doi:10.1049/iet-rpg.2015.0453

Cited by 11 publications

(4 citation statements)

References 20 publications

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“…Jianwen Zhang et al [2] This revision of the control algorithm is often implemented on the local DCWT controller without requiring communication. The exact DCWT strategy for variable speed control is implemented during a generalized averaging model.…”

Section: Literature Reviewmentioning

confidence: 99%

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A New Fuzzy Based UPFC Topology for Active Power Enhancement in an offshore Wind Farm

Rathore

Singh²

2021

IJOSCIENCE

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The stability of a power system is the ability of a power system to restore an operating state of equilibrium for a given initial operating condition after it has been subjected to a physical disturbance, most of the variables of the system being limited so that almost the entire system remains intact. To create a MATLAB SIMULINK model of odd shore wind energy system having power being transmitted through DC transmission system. The first model will have no power flow controller and second model will have artificial intelligence based controlling technique. To design a controller for enhancing the power output from the wind energy system using UPFC. This will be made to feed DC transmission system. Finally integrating the system with long distance DC transmission system and then to the grid so as to make it more reliable and efficient. In this work a coordinated control based on Fuzzy logic for UPFC for cluster of offshore WPP connected to the same HVDC connection is being implemented and analyzed. The study is targeting coordination of reactive power flow and active power flow between HVDC Converter and the WPP cluster while providing offshore AC grid voltage control. Thus it can be drawn from this work that while designing a power control strategy the proposed fuzzy logic based active power controller in UPFC can serve the purpose with better results in terms of active as well as reactive power. This control can also be used in hybrid systems thus making it more reliable controlling method. The

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Section: Literature Reviewmentioning

confidence: 99%

“…A generic equation is used to model the power coefficient C P based on the modeling turbine characteristics described in [2], [7][8][9] and [11] as:…”

Section: Wwwijosciencecommentioning

confidence: 99%

A New Fuzzy Based UPFC Topology for Active Power Enhancement in an offshore Wind Farm

Rathore

Singh²

2021

IJOSCIENCE

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“…In [29], Liang proposes a study on operation and control of multiterminal HVDC transmission for offshore wind farm. Subsequently in [30], Raza presented a paper on coordinating a VSC-based multiterminal HVDC transmission system and lastly, in [35], Shi suggested an improved variable speed control for a series-connected collection system connecting to an HVDC transmission system.…”

Section: Summary Of Proposed System Performances Against Other DC Colmentioning

confidence: 99%

Design and Control of a DC Collection System for Modular-Based Direct Electromechanical Drive Turbines in High Voltage Direct Current Transmission

2020

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In response to an increasing demand for offshore turbine-based technology installations, this paper proposes to design a DC collection system for multi-connected direct drive turbines. Using tidal stream farm as the testbed model, inverter design and turbine control features were modelled in compliance with high voltage ride-through capabilities that operate in isochronous mode suggested by IEEE1547-2018. The aim of the paper is twofold. Firstly, operation analyses in engaging a single-stage impedance source inverter as an AC-link busbar aggregator to pilot a parallel-connected electromechanical drive system. It uses a closed-loop voltage controller to secure voltage-active power (Volt/Watt) dynamics in correspondence with turbine’s arbitrary output voltage level. It also aspires to truncate active rectification stages at generation-side as opposed to a traditional back-to-back converter. Secondly, a proposition for a torque-controlled blade pitching system is modelled to render a close to maximum power point tracking using blade elevation and mechanical speed manipulations. The reserve active power generation aids with compensating an over-voltage crisis as a substitute for typical reactive power absorption. The proposed Testbed system was modelled in PSCAD, adopting industrial related specifications and real-time ocean current profiles for HVDC transmission operations. Analytical results have shown a positive performance index and transient responses at respective tidal steam turbine clusters that observe fault ride-through criterion despite assertive operating conditions.

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“…In this way, the MPPT can be realized, but it is infeasible when there are several parallel clusters of series-connected wind turbines. In reference [23], an improved rotor speed control to store the energy in the wind turbine rotor was studied, but the PMSG faced the danger of overvoltage when the rotor stored such a high level of energy. In reference [24], flywheel energy storage system was applied for energy storage.…”

Section: Introductionmentioning

confidence: 99%

HVDC Transmission Technology of Wind Power System with Multi-Phase PMSG

et al. 2018

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The high voltage DC (HVDC) transmission technology of wind power system, with multi-phase permanent magnetic synchronous generator (PMSG) is proposed in this paper. Each set of three-phase winding of the multi-phase PMSG was connected to a diode rectifier. The output of the diode rectifier was connected by several parallel isolated DC–DC converters. Each DC–DC converter was connected to a sub-module (SM). All SMs and two inductors were connected in a series. The proposed wind power system has several advantages including, transformerless operation, low cost, low voltage stress, and high fault tolerance. The maximum power point tracking (MPPT) and energy balance of the DC–DC converters were achieved by controlling the duty cycles of the DC–DC converters. The HVDC transmission was achieved by the nearest level control (NLC) with voltage sorting. The simulation model with 18-phase PMSG was established. Experimental results were also studied based on RT-Lab.

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Improved variable speed control of series‐connected DC wind turbines for offshore wind power collection to high‐voltage direct current system

Cited by 11 publications

References 20 publications

A New Fuzzy Based UPFC Topology for Active Power Enhancement in an offshore Wind Farm

A New Fuzzy Based UPFC Topology for Active Power Enhancement in an offshore Wind Farm

Design and Control of a DC Collection System for Modular-Based Direct Electromechanical Drive Turbines in High Voltage Direct Current Transmission

HVDC Transmission Technology of Wind Power System with Multi-Phase PMSG

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